[INFO] updating cached repository remychantenay/rust-microgrep
[INFO] running `"git" "fetch" "--all"`
[INFO] [stdout] Fetching origin
[INFO] [stderr] From git://github.com/remychantenay/rust-microgrep
[INFO] [stderr]  * branch            HEAD       -> FETCH_HEAD
[INFO] running `"git" "clone" "work/cache/sources/gh/remychantenay/rust-microgrep" "work/ex/beta-1.38-1/sources/1.37.0/gh/remychantenay/rust-microgrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/1.37.0/gh/remychantenay/rust-microgrep'...
[INFO] [stderr] done.
[INFO] running `"git" "clone" "work/cache/sources/gh/remychantenay/rust-microgrep" "work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/remychantenay/rust-microgrep"`
[INFO] [stderr] Cloning into 'work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/remychantenay/rust-microgrep'...
[INFO] [stderr] done.
[INFO] running `"git" "rev-parse" "HEAD"`
[INFO] [stdout] 85abd52e7bb7023ef68c154747948495bf024fc3
[INFO] sha for GitHub repo remychantenay/rust-microgrep: 85abd52e7bb7023ef68c154747948495bf024fc3
[INFO] validating manifest of remychantenay/rust-microgrep on toolchain 1.37.0
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] validating manifest of remychantenay/rust-microgrep on toolchain beta-2019-08-13
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "read-manifest" "--manifest-path" "Cargo.toml"`
[INFO] started frobbing remychantenay/rust-microgrep
[INFO] finished frobbing remychantenay/rust-microgrep
[INFO] frobbed toml for remychantenay/rust-microgrep written to work/ex/beta-1.38-1/sources/1.37.0/gh/remychantenay/rust-microgrep/Cargo.toml
[INFO] started frobbing remychantenay/rust-microgrep
[INFO] finished frobbing remychantenay/rust-microgrep
[INFO] frobbed toml for remychantenay/rust-microgrep written to work/ex/beta-1.38-1/sources/beta-2019-08-13/gh/remychantenay/rust-microgrep/Cargo.toml
[INFO] crate remychantenay/rust-microgrep already has a lockfile, it will not be regenerated
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+1.37.0" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] running `"/mnt/big/crater/work/local/cargo-home/bin/cargo" "+beta-2019-08-13" "fetch" "--locked" "--manifest-path" "Cargo.toml"`
[INFO] testing remychantenay/rust-microgrep against 1.37.0 for beta-1.38-1
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/remychantenay/rust-microgrep:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "build" "--frozen"`
[INFO] [stdout] 67ac62440630f256fdd7b984968bb628c10865339dcf8262b20e241ed54d5dbe
[INFO] running `"docker" "start" "-a" "67ac62440630f256fdd7b984968bb628c10865339dcf8262b20e241ed54d5dbe"`
[INFO] [stderr]    Compiling microgrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/io/mod.rs:5:61
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_to_string(filename: &str) -> Result<String, Box<Error>> {
[INFO] [stderr]   |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let mut search_results: Vec<&str>;
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.26s
[INFO] running `"docker" "inspect" "67ac62440630f256fdd7b984968bb628c10865339dcf8262b20e241ed54d5dbe"`
[INFO] running `"docker" "rm" "-f" "67ac62440630f256fdd7b984968bb628c10865339dcf8262b20e241ed54d5dbe"`
[INFO] [stdout] 67ac62440630f256fdd7b984968bb628c10865339dcf8262b20e241ed54d5dbe
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/remychantenay/rust-microgrep:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen" "--no-run"`
[INFO] [stdout] 4a66287a8828d743bd94263a0f837d75a541c7a76e68398624ca7bac02be6d95
[INFO] running `"docker" "start" "-a" "4a66287a8828d743bd94263a0f837d75a541c7a76e68398624ca7bac02be6d95"`
[INFO] [stderr]    Compiling microgrep v0.1.0 (/opt/crater/workdir)
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]  --> src/io/mod.rs:5:61
[INFO] [stderr]   |
[INFO] [stderr] 5 | pub fn file_to_string(filename: &str) -> Result<String, Box<Error>> {
[INFO] [stderr]   |                                                             ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr]   |
[INFO] [stderr]   = note: #[warn(bare_trait_objects)] on by default
[INFO] [stderr] 
[INFO] [stderr] warning: trait objects without an explicit `dyn` are deprecated
[INFO] [stderr]   --> src/lib.rs:40:46
[INFO] [stderr]    |
[INFO] [stderr] 40 | pub fn run(config: Config) -> Result<(), Box<Error>> {
[INFO] [stderr]    |                                              ^^^^^ help: use `dyn`: `dyn Error`
[INFO] [stderr] 
[INFO] [stderr] warning: variable does not need to be mutable
[INFO] [stderr]   --> src/lib.rs:44:9
[INFO] [stderr]    |
[INFO] [stderr] 44 |     let mut search_results: Vec<&str>;
[INFO] [stderr]    |         ----^^^^^^^^^^^^^^
[INFO] [stderr]    |         |
[INFO] [stderr]    |         help: remove this `mut`
[INFO] [stderr]    |
[INFO] [stderr]    = note: #[warn(unused_mut)] on by default
[INFO] [stderr] 
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 1.20s
[INFO] running `"docker" "inspect" "4a66287a8828d743bd94263a0f837d75a541c7a76e68398624ca7bac02be6d95"`
[INFO] running `"docker" "rm" "-f" "4a66287a8828d743bd94263a0f837d75a541c7a76e68398624ca7bac02be6d95"`
[INFO] [stdout] 4a66287a8828d743bd94263a0f837d75a541c7a76e68398624ca7bac02be6d95
[INFO] running `"docker" "create" "-v" "/mnt/big/crater/work/local/target-dirs/beta-1.38-1/worker-2/1.37.0:/opt/crater/target:rw,Z" "-v" "/mnt/big/crater/work/ex/beta-1.38-1/sources/1.37.0/gh/remychantenay/rust-microgrep:/opt/crater/workdir:ro,Z" "-v" "/mnt/big/crater/work/local/cargo-home:/opt/crater/cargo-home:ro,Z" "-v" "/mnt/big/crater/work/local/rustup-home:/opt/crater/rustup-home:ro,Z" "-e" "USER_ID=1000" "-e" "SOURCE_DIR=/opt/crater/workdir" "-e" "MAP_USER_ID=1000" "-e" "CARGO_TARGET_DIR=/opt/crater/target" "-e" "CARGO_INCREMENTAL=0" "-e" "RUST_BACKTRACE=full" "-e" "RUSTFLAGS=--cap-lints=warn" "-e" "CARGO_HOME=/opt/crater/cargo-home" "-e" "RUSTUP_HOME=/opt/crater/rustup-home" "-w" "/opt/crater/workdir" "-m" "1536M" "--network" "none" "rustops/crates-build-env" "/opt/crater/cargo-home/bin/cargo" "+1.37.0" "test" "--frozen"`
[INFO] [stdout] 797e718fe789318ab5ab2a65b5a1ecfc93d12f60cea8a7bb4a45709c4fa1154d
[INFO] running `"docker" "start" "-a" "797e718fe789318ab5ab2a65b5a1ecfc93d12f60cea8a7bb4a45709c4fa1154d"`
[INFO] [stderr]     Finished dev [unoptimized + debuginfo] target(s) in 0.04s
[INFO] [stderr]      Running /opt/crater/target/debug/deps/microgrep-94185b394a44957f
[INFO] [stdout] 
[INFO] [stdout] running 3 tests
[INFO] [stdout] test search::tests::search_one_result ... ok
[INFO] [stdout] test search::tests::search_no_result ... ok
[INFO] [stdout] test search::tests::search_insensitive ... ok
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 3 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]      Running /opt/crater/target/debug/deps/microgrep-0b4fea7591c78b8c
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] [stderr]    Doc-tests microgrep
[INFO] [stdout] 
[INFO] [stdout] running 0 tests
[INFO] [stdout] 
[INFO] [stdout] test result: ok. 0 passed; 0 failed; 0 ignored; 0 measured; 0 filtered out
[INFO] [stdout] 
[INFO] running `"docker" "inspect" "797e718fe789318ab5ab2a65b5a1ecfc93d12f60cea8a7bb4a45709c4fa1154d"`
[INFO] running `"docker" "rm" "-f" "797e718fe789318ab5ab2a65b5a1ecfc93d12f60cea8a7bb4a45709c4fa1154d"`
[INFO] [stdout] 797e718fe789318ab5ab2a65b5a1ecfc93d12f60cea8a7bb4a45709c4fa1154d